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(No Model.)

G. W. BAKER. SLIDE FOR SEWING MACHINES.

Patented Mar. 11, 1890.

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UNITED STATES PATENT OFFIGE.

GEORGE WV. BAKER, OF CLEVELAND, OHIO, ASSIGNOR TO THE WHITE SEWINGMACHINE COMPANY, OF SAIWIE PLACE.

SLIDE FOR SEWING MACH IN ES.

' SPECIFICATION forming part of Letters Patent No. 423,112, dated March11, 1890.

Application filed August 1, 1889.

To aZZ whom it may concern:

Be it known that I, GEORGE IV. BAKER, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Slides for Sewing-Machines; and I do hereby declare thefollowing to be a full, c1ear,and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same.

My invention relates to improvements in slides for sewing-machines; andit consists in certain features of construction and in combination ofparts, hereinafter described, and pointed out in the claims.

I-Ieretofore the practice has been to provide the slide with tonguesalong the edges thereof, these tongues being beveled to a thin sharpedge, with corresponding V-shaped grooves in the internal edges of theface-plate to receive the tongues. With such construction the difficultywas that the milling-tool for cutting such grooves, owing to the extremesharp thin edges thereof, could not be kept to standard size, andconsequently the slide had to be fitted by hand and wasnotinterchangeable; hence if a slide was lost there was no surety thatanother slide sent out from the factory would fit. The cost, too, offitting these slides was considerable. To overcome such difficulties, Ihave devised the slide illustrated in the accompanying drawings.

Figure l is a plan. Figs. 2, 3, and 4 are enlarged elevations in sectionin detail. Fig. 5 is an edge view of the slide.

Arepresents a portion of a sewing-machine, and B B the slides. Theslides are struck up from thin plate metal, the thickness of the slides,as shown in the drawings, being considerably exaggerated. The slideshave shoulders or offsets b, and have square-edged tongues I) along thesides of the slide. The

internal edges of the cloth-plate are grooved at a to receive tongues awith an easy fit, these grooves being rectangular in cross-sec- Serial110.319,):69. (No model.)

tion, and are made so deep that the tongues do not strike bottom in thegrooves. Shoulders b of the slide abut with an easy fit shoulders at ofthe cloth-plate. The millingtool for cutting grooves a, beingsquareedged, will cut a large number of grooves, remaining meantimeapproximately standard size, and if the grooves should vary a trifle indepth it will not interfere with the working of the slide. NVith suchconstruction there is found no difficulty in making the slidesinterchangeable, and that, too, without refitting. The slide fits easilyin its place, and to prevent its moving too freely the slide is slightlycurved lengthwise. This curvature is so slight that it would not beperceptible in the drawings, and is therefore shown in Fig. 5exaggerated. The slide is thin and elastic, and straightens out as itenters the groove, the tension of the slide being sufficient to hold itfrom moving too freely.

What I claim is 1. A slide for sewing machines, having squarecdgedtongues along the sides thereof, the lower faces of the tongues being inaplane below the lower face of the slide, the internal edges of thecloth-plate having corresponding grooves rectangular in section forreceiving the tongues, the slides being offset, and the externalshoulders thereof engaging the opposing edges of the cloth-plate,substantially as and for the purpose set forth.

2. A slide for sewing-machines, slightly curved in the direction of itslength and provided at its longitudinal side edges with square edgetongues, the lower faces of the latter being in a plan'e'below thebottom face of the slide-plate, substantially as set forth.

In testimony whereof I sign this specification, in the presence of twowitnesses, this 15th day of June, 1889.

' GEORGE WV. BAKER. Witnesses:

CHAS. H. Donna, ALBERT E. LYNoH.

